/*
 * Copyright (C) 2006-2010 Alfresco Software Limited.
 *
 * This file is part of Alfresco
 *
 * Alfresco is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Alfresco is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
 */

package org.alfresco.jlan.server.auth;

import java.security.SecureRandom;

import org.alfresco.jlan.util.DataPacker;
import org.alfresco.jlan.util.HexDump;

/**
 * NTLM1/LanMan CIFS Authentication Context Class
 *
 * <p>Holds the challenge sent to the client during the negotiate phase that is used to verify the
 * hashed password in the session setup phase.
 *
 * @author gkspencer
 */
public class NTLanManAuthContext extends ChallengeAuthContext {

  // Random number generator used to generate challenge
  private static SecureRandom m_random = new SecureRandom();

  /**
   * Class constructor
   */
  public NTLanManAuthContext() {

    // Generate a new challenge key, pack the key and return

    m_challenge = new byte[8];
    DataPacker.putIntelLong(m_random.nextLong(), m_challenge, 0);
  }

  /**
   * Class constructor
   *
   * @param challenge byte[]
   */
  public NTLanManAuthContext(byte[] challenge) {
    m_challenge = challenge;
  }

  /**
   * Return the CIFS authentication context as a string
   *
   * @return String
   */
  public String toString() {

    StringBuffer str = new StringBuffer();

    str.append("[NTLM,Challenge=");
    str.append(HexDump.hexString(m_challenge));
    str.append("]");

    return str.toString();
  }
}
